You're assuming that the planes can be disassembled and put back together, and that the assembly line didn't screw up harder to fix things. They checked the do

You're assuming that the planes can be disassembled and put back together, and that the assembly line didn't screw up harder to fix things. They checked the doors and tail wing for loose bolts, and one airline reported loose parts in the tail wing. Some of the bolts and parts are more important than a door plug. What do you with all the load bearing parts that have been flying with a few missing bolts? X-Ray them to check for microscopic stress lines? Also, what's the failure rate of a plane that's been taken apart and put back together in the field (including things outside of routine maintenance)? I'm guessing it's closer to the end of life reliability than beginning of life reliability. The way things are trending, at some point the depreciation, repair costs, cancelled flights and increased probability of loss of life will exceed $60M per plane. It's got to be in the millions already. Low tens of millions wouldn't surprise me.